Re: Working network connectivity, not working DNS resolutions
On 2010-03-25 13:54, Mike Viau wrote:
Hello debian-users,
I have run into an interesting issue with the DNS resolution on only
_one_ of my debian lenny systems on my network.
I have confirmed that this system has working network connectivity but I
would like to restore the ability to query DNS records from my local DNS
server which is also in my case my network gateway. Additionally I can
ssh into the system easily while connected to the same local network
10.254.2.0/24
The working (as in with other systems on my network) DNS and router is
at 10.254.2.254/24. The IP statically set for the debian system is
10.254.2.1/24
How is this machine configured differently than the other two?
Some info from this AMD64 architecture system is below.
root@localhost:~# cat /etc/debian_version
5.0.4
root@localhost:~# cat /etc/resolv.conf
domain site
search site
Why these two lines?
Why *before* the nameserver?
nameserver 10.254.2.254
How are you populating this file?
root@localhost:~# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use
Iface
10.254.2.0 * 255.255.255.0 U 0 0 0
br200
default 10.254.2.254 0.0.0.0 UG 0 0 0
br200
Snippet from /etc/network/interfaces:
# LAN bridge
iface eth1.200 inet manual
auto br200
iface br200 inet static
address 10.254.2.1
Why the non-standard interface name?
network 10.254.2.0
netmask 255.255.255.0
broadcast 10.254.2.255
gateway 10.254.2.254
bridge-ports eth1.200
Why not add a dns-nameservers to "iface br200"?
root@localhost:~# ping 66.249.90.104 (a google IP beyond local router)
PING 66.249.90.104 (66.249.90.104) 56(84) bytes of data.
64 bytes from 66.249.90.104: icmp_seq=1 ttl=53 time=25.7 ms
64 bytes from 66.249.90.104: icmp_seq=2 ttl=53 time=24.3 ms
64 bytes from 66.249.90.104: icmp_seq=3 ttl=53 time=25.0 ms
Can you ping 10.254.2.254? I'm sure you can, but just asking.
root@localhost:~# traceroute 66.249.90.104
traceroute to 66.249.90.104 (66.249.90.104), 30 hops max, 40 byte packets
1 * * *
2 * * *
Try mtr-tiny instead.
--
"History does not long entrust the care of freedom to the weak
or the timid." Dwight Eisenhower
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